Am 04.03.2014 05:19, schrieb William Herrin: > Reasons why dynamic DNS fails to perform as expected include: > > * Web browser DNS pinning can result in a customer's web browser > holding the old IP address indefinitely. > > * Host-level caching of looked up names which discards the TTL. > Remember: your desktop or laptop performs lookups against multiple > name services, e.g. DNS, /etc/hosts, lmhosts, NIS+. DNS TTL is no > longer in scope once the name to address map enters the generic host > lookup mechanism. Most OSes have a fixed timeout of one sort or > another, some old ones as long as 24 hours.
* Eyeball ISPs' DNS resolvers might tamper with TTL values. -- SEBASTIAN SPIES lnked.in/sspies vastly.de
